diff --git a/teams/sumrise/week4.py b/teams/sumrise/week4.py
new file mode 100644
index 0000000..5b05cfa
--- /dev/null
+++ b/teams/sumrise/week4.py
@@ -0,0 +1,47 @@
+# -*- coding: utf-8 -*-
+
+"""
+
+@author: sumrise
+@time: 2021-05-13 23:07
+"""
+
+from flow_py_sdk import flow_client
+import json
+import asyncio
+
+
+async def get_nba_transaction_events():
+    async with flow_client(
+            host="access.mainnet.nodes.onflow.org", port=9000
+    ) as client:
+        block = await client.get_latest_block(is_sealed=True)
+        print(f"block.height: {block.height}\n")
+        startBlock, endBlock = block.height - 15, block.height
+        event_type = "A.c1e4f4f4c4257510.Market.MomentPurchased"
+        print("当前区块高度: {}".format(block.height))
+        print("下面查询高度 {} - {} 的MomentPurchased".format(startBlock, endBlock))
+
+        block_events = await client.get_events_for_height_range(
+            type=event_type,
+            start_height=startBlock,
+            end_height=endBlock
+        )
+        for block_event in block_events:
+            for event in block_event.events:
+                print("type: {}".format(event.type))
+                print("transaction_id: {}".format(event.transaction_id.hex()))
+
+                fields = json.loads(event.payload)['value']['fields']
+                id = fields[0]['value']['value']
+                price = fields[1]['value']['value']
+                seller = fields[2]['value']['value']['value']
+
+                print("id: {}".format(int(id)))
+                print("price: {}".format(float(price)))
+                print("seller: {}".format(seller))
+                print()
+
+
+if __name__ == "__main__":
+    asyncio.run(get_nba_transaction_events())